Moon · December 2025
Moon calendar for Casper, Wyoming, United States: December 2025
Daily moon phases, illumination, moonrise and moonset in Casper, Wyoming, United States for December 2025. Full moon: December 4, 2025. All times are shown in the local time of Casper, Wyoming, United States.
Full moonThursday, December 4, 2025, 4:18 PM
New moonFriday, December 19, 2025, 7:59 PM
| Day | Phase | Illumination | Moonrise | Moonset |
|---|---|---|---|---|
| 1 | Waxing Gibbous | 87% | 1:43 PM | 3:42 AM |
| 2 | Waxing Gibbous | 94% | 2:17 PM | 5:15 AM |
| 3 | Waxing Gibbous | 98% | 2:37 PM | 6:24 AM |
| 4 | Full Moon | 100% | 3:36 PM | 7:47 AM |
| 5 | Waning Gibbous | 99% | 4:23 PM | 9:11 AM |
| 6 | Waning Gibbous | 95% | 5:40 PM | 10:09 AM |
| 7 | Waning Gibbous | 89% | 6:56 PM | 10:46 AM |
| 8 | Waning Gibbous | 81% | 8:19 PM | 11:35 AM |
| 9 | Waning Gibbous | 72% | 9:36 PM | 11:52 AM |
| 10 | Waning Gibbous | 62% | 10:33 PM | 12:19 PM |
| 11 | Last Quarter | 52% | 11:50 PM | 12:27 PM |
| 12 | Last Quarter | 41% | — | 12:50 PM |
| 13 | Waning Crescent | 32% | 12:58 AM | 1:26 PM |
| 14 | Waning Crescent | 23% | 2:07 AM | 1:35 PM |
| 15 | Waning Crescent | 16% | 3:18 AM | 1:52 PM |
| 16 | Waning Crescent | 10% | 4:26 AM | 2:21 PM |
| 17 | Waning Crescent | 5% | 5:23 AM | 2:45 PM |
| 18 | Waning Crescent | 2% | 6:16 AM | 3:36 PM |
| 19 | New Moon | 0% | 7:21 AM | 4:20 PM |
| 20 | New Moon | 1% | 8:04 AM | 5:27 PM |
| 21 | Waxing Crescent | 3% | 8:34 AM | 6:19 PM |
| 22 | Waxing Crescent | 7% | 9:31 AM | 7:33 PM |
| 23 | Waxing Crescent | 13% | 9:49 AM | 8:27 PM |
| 24 | Waxing Crescent | 21% | 10:21 AM | 9:42 PM |
| 25 | Waxing Crescent | 30% | 10:31 AM | 10:54 PM |
| 26 | First Quarter | 41% | 11:10 AM | — |
| 27 | First Quarter | 52% | 11:34 AM | 12:14 AM |
| 28 | Waxing Gibbous | 63% | 11:44 AM | 1:33 AM |
| 29 | Waxing Gibbous | 74% | 12:17 PM | 2:34 AM |
| 30 | Waxing Gibbous | 84% | 12:33 PM | 4:09 AM |
| 31 | Waxing Gibbous | 91% | 1:32 PM | 5:36 AM |
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Frequently asked questions
When is the full moon in December 2025 in Casper, Wyoming, United States?
The full moon peaks on Thursday, December 4, 2025, 4:18 PM (local time).
When is the new moon in December 2025?
The new moon falls on Friday, December 19, 2025, 7:59 PM (local time) — the darkest nights of the month, best for stargazing.
Data: Meeus astronomical algorithms. How we calculate this
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